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An alternate approach to managing Lion / Life 2S battery packs

  • Kevin Ross
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23 Feb 2022 18:30 #25604 by Kevin Ross
During the last year I have replaced all my Rx and Ignition NIMH batteries with lithium ion or Lipo4. The advantage of both compared with Lipo is they can be safely kept and charged in the model, but with limited access on my scale type models connecting both a power and balance socket for charging is awkward. I retained the existing and adequate JR connectors but they also require safety connector locks.

The first pic shows the old and new system.

My solution is to rewire all battery backs and related Rx & Ignition power plugs with these AMASS 3 way connectors for Pos, Neg and centre balance wire so that only single connector is required for charging or flight. I'll also make special charger adapter leads to connect the balance ports at the charger.

These connectors have 2 mm sprung pins rated at 15amps and have sufficient friction to negate the need for connector locks but have nice grab detents to allow separating.
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23 Feb 2022 20:28 #25606 by Dave Bright
Like the AMASS 3 connectors also. Using them for tailplane and batteries in the Rebel.

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24 Feb 2022 10:22 #25607 by Phillip Ford
Thanks Kevin for your info on Ammas. Just what I was looking for. I have ordered some 3 pin XT30 and XT60s.

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24 Feb 2022 11:26 #25610 by Kevin Ross
The MR30 solder buckets Just accept 18awg cable - (my subsequent attempts did improve)

The final lead is this MR30 male pin to 3pin JST balance adapter to test the batteries before model assembly at the field.
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24 Feb 2022 11:44 #25612 by Brian Jackson
Took me a while to understand how the three wire connection worked, neat solution Kevin.

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24 Feb 2022 12:21 #25613 by Phillip Ford
Slightly off subject but I am looking at these housings so I can make more solid servo connections using my stock of mpx 6 pin plugs n sockets. Any good? I did look at 3D print stuff but just not the same as molded plastic.

4 Pieces of plastic fastening 6-pin MPX connector for easier wiring. Model shop Leeds £1.25
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24 Feb 2022 13:35 #25614 by Kevin Ross
There are variations on the MXP connector style if you search VTOL connector. Can be described JX6 , 8 etc and available with built in mounting flanges. you would common all the POS & NEG wires and separate the signal wires by servo. I have an Ali express account if you wish me to order some but delivery can take up to 4 weeks. I considered these before selecting the AMSS 30

www.aliexpress.com/item/1005001676631511...Brecommend-recommend
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24 Feb 2022 14:25 - 24 Feb 2022 14:26 #25615 by Phillip Ford
Nice but I don't need the power pins. I am trying to reduce the number of leads and a snake pit into just a simple harness for wing wiring. I did find these molded 8 pin MPX units at Unmannedtechshop. £0.99 a pair. Similar to what Alixpress sell.....
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24 Feb 2022 15:34 #25616 by Kevin Ross
Phil
That type is also listed on the Aliexpress link and would be perfect.

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